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US 11,543,575 B2Granted
Holographic display apparatus illuminating a hologram and a holographic image
AssigneeCeres Imaging Limited
InventorsIan Redmond, Duncan Anderson
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Abstract
There is herein defined optics (e.g. an array of optics) forming an optical beam to either produce a collimated or diverging/converging beam emerging from a virtual source point to illuminate a hologram. There is also described an optical beam illuminating a reflection hologram from the front and a further configuration where an optical beam combined with a holographic optical element (HOE) minor enables rear illumination of a reflection hologram.
Claims14
A holographic display apparatus comprising:
- an illumination unit capable of emitting light to illuminate a hologram and form a consequent holographic image,
- wherein the illumination unit is comprised of an array of individual sub-units, each comprising a light source and corresponding optics, the illumination unit forming an overall collimated, diverging or converging beam, and
- wherein the array of individual sub-units are arranged only at one edge of the hologram and provide an offset angle of illumination.
Dependencies are inferred from the claim text.